The preservation of health is a duty. Few seem conscious that there is such a thing as physical morality.

If every man has freedom to do all that he wills, provided he infringes not the equal freedom of any other man, then he is free to drop connection with the state-to relinquish its protection, and to refuse paying toward its support.

The fact disclosed by a survey of the past that majorities have been wrong must not blind us to the complementary fact that majorities have usually not been entirely wrong.

If a single cell, under appropriate conditions, becomes a man in the space of a few years, there can surely be no difficulty in understanding how, under appropriate conditions, a cell may, in the course of untold millions of years, give origin to the human race.

What, then, do they want a government for? Not to regulate commerce; not to educate the people; not to teach religion, not to administer charity; not to make roads and railways; but simply to defend the natural rights of man -- to protect person and property -- to prevent the aggressions of the powerful upon the weak -- in a word, to administer justice. This is the natural, the original, office of a government. It was not intended to do less: it ought not to be allowed to do more.

All socialism involves slavery.

No one can be perfectly free till all are free; no one can be perfectly moral till all are moral; no one can be perfectly happy till all are happy.